1Class

Question

Multiple-Choice Questions
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2Class
Written-Response Question #1
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3Class
Written-Response Question #2
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Multiple-Choice Questions
A row of 4 diagrams, each labeled with a letter and caption. Choice A: Sand and dirt filled in the gap that was created by the plates moving apart. Choice B: Soft, solid rock from underneath the plates rose and hardened, adding solid rock to the edges of both plates. Choice C: A new plate from underneath filled in the gap that was created by the plates moving apart. Choice D: Ocean water filled in the gap that was created by the plates moving apart.
8. Dr. Mendoza and his team are studying two plates that are far apart from each other. However, these two plates used to be next to each other. Which diagram shows what happened between these plates?

Responses

a
Diagram A: Sand and dirt filled in the gap that was created by the plates moving apart.
Diagram A: Sand and dirt filled in the gap that was created by the plates moving apart.

b
Diagram B: Soft, solid rock from underneath the plates rose and hardened, adding solid rock to the edges of both plates.
Diagram B: Soft, solid rock from underneath the plates rose and hardened, adding solid rock to the edges of both plates.

c
Diagram C: A new plate from underneath filled in the gap that was created by the plates moving apart.
Diagram C: A new plate from underneath filled in the gap that was created by the plates moving apart.

d
Diagram D: Ocean water filled in the gap that was created by the plates moving apart.
Diagram D: Ocean water filled in the gap that was created by the plates moving apart.

Answer 1

In the context of tectonic plate movement, the explanation involving two plates that were once next to each other and are now far apart suggests a scenario involving seafloor spreading at a divergent boundary.

The correct choice would be:

b
Diagram B: Soft, solid rock from underneath the plates rose and hardened, adding solid rock to the edges of both plates.

This choice accurately describes the process where magma from the mantle rises to fill the gap between the diverging plates, solidifying and creating new crust.